/*
 * @Description: 
 * @version: 1.0
 * @Author: ziwei
 * @Date: 2021-08-15 11:45:02
 * @LastEditors: ziwei
 * @LastEditTime: 2021-08-15 11:45:54
 */
type A = {a:string}
type B = {b:string}
type AB = A&B;
let ab:AB = {a:'1',b:'1'}